Rhodium-111

Properties and data of the isotope ¹¹¹Rh.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Rhodium isotopes (and general data sources).

General data

Name of the isotope:Rhodium-111; Rh-111Symbol:¹¹¹Rh or 11145RhMass number A:111 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:66Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.4666666666667 (= neutron-proton ratio)Neutron excess (N-Z):21Isotopic mass:110.911643(7) u (atomic weight of Rhodium-111)Nuclide mass:110.8869582 u (calculated nuclear mass without electrons)Mass excess:-82.30402 MeVMass defect:1.012367896 u (per nucleus)Nuclear binding energy:943.01462092 MeV (per nucleus)
8.49562722 MeV (average binding energy per nucleon)Separation energy:S_N = 7.547(19) MeV (first neutron)
S_P = 9.521(11) MeV (first proton)Half-life:11(1) sDecay constant λ:0.063013380050904 s^-1Specific activity α:3.449776824793 × 10⁺²⁰ Bq g^-1
9323721148.0903 Ci g^-1Spin and parity:
(nuclear angular momentum)(7/2+)Year of discovery:1975

Radioactive Decay

Half-life T_½ = 11(1) s respectively 1.1 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹¹¹Pd	100 %	3.681(7) MeV

Parent Nuclides

Direct parent isotope is: ¹¹¹Ru.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 66) and isobaric (same nucleon number A = 111) with Rhodium-111. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 66	Isobar A = 111
37	¹⁰³Rb
38	¹⁰⁴Sr
39	¹⁰⁵Y
40	¹⁰⁶Zr	¹¹¹Zr
41	¹⁰⁷Nb	¹¹¹Nb
42	¹⁰⁸Mo	¹¹¹Mo
43	¹⁰⁹Tc	¹¹¹Tc
44	¹¹⁰Ru	¹¹¹Ru
45	¹¹¹Rh	¹¹¹Rh
46	¹¹²Pd	¹¹¹Pd
47	¹¹³Ag	¹¹¹Ag
48	¹¹⁴Cd	¹¹¹Cd
49	¹¹⁵In	¹¹¹In
50	¹¹⁶Sn	¹¹¹Sn
51	¹¹⁷Sb	¹¹¹Sb
52	¹¹⁸Te	¹¹¹Te
53	¹¹⁹I	¹¹¹I
54	¹²⁰Xe	¹¹¹Xe
55	¹²¹Cs
56	¹²²Ba
57	¹²³La
58	¹²⁴Ce
59	¹²⁵Pr
60	¹²⁶Nd
61	¹²⁷Pm
62	¹²⁸Sm